Slider for slide fasteners



D66. 24, 1935. N J PQUX 2,025,693

SLIDER FOR SLIDE FASTENERS Filed Jan. 28, 1931 H66. H69. 3 Ha/[ A TTORNEYS.

Patented Dec. 24, 1935 \SLIDER FOR SLIDE FASTENERS Noel J. Poux, Meadville, Pa., assignor to Lion Fastener, Inc., Meadville, Pa., a corporation of Delaware Application January 28, 1931, Serial No. 511,753

8 Claims.

It is desirable to provide locks for sliders of slide fasteners so that the slide may be moved along to any position on the fastener and locked in the adjusted position. The present invention is designed to provide such a lock securing the slider firmly in any adjusted position, yet one that will be readily released through the mere operation of the tab. The invention contemplates the normal engagement of the slider through the locking means, said means being unlocked through the action of the tab when adjusting the slider. The invention also contemplates the housing of the locking means by the tab lug so that while it is of ample size and strength it is practically concealed. Features and details of the invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in the accompanying drawing as follows:

Fig. 1 shows a side elevation, partly in section, of the slider in place on a fastener, the locking means being retracted, or out of locking position.

Fig. 2 a plan view of the slider in place on a fastener.

Fig. 3 a view similar to Fig. 1, but with the locking means in locked position.

Fig. 4 a section on the line 4-.-4.in Fig. 3.

Fig. 5 a perspective view of the locking pawl.

Fig. 6 a sectional view of the tab lug on the line 66 in Fig. '7.

Fig. 7 a side elevation of the tab lug removed.

Fig. 8 a side elevation of a modified form of slider with the parts in looking position;

Fig. 9 a similar view with the parts in retracted, or unlocked position.

Fig, 10 a perspective view of the pawl in the modification of Figs. 8 and 9.

Fig. 11 a plan view of one of the guide plates detached.

l marks a. stringer, 2 the usual rib along the fastening edge of the stringer, 3 the fastener members provided with the usual projections 4 and recesses 5, 6 guide plates of the slider, and 1 the wedge, or spreading guide of the slider. The

slider is provided with the usual guide flanges 8.

The tab lug 9 is preferably T-shaped in cross section having a longitudinal covering plate 9a with an inwardly extending web 91). One end of the plate 911 is turned in at Ill against the end of the web 91; with an extension Illa which is adapted to extend through registering perforations II in the plates 6 and spreader I.

Illa, therefore, forms a means for loclnng the two guide plates together. The opposite end of .the notch .l I.

The extensionthe plate 9a is bent inwardly at l2 around the end of the web 9b and has an extension projecting into a perforation l3 in the guide plate and is riveted over on the under-side of the plate, thus securing the guide lug on the plate.

The guide plate has a pawl opening l4 through which a pawl finger l5 extends. The pawl finger is carried by a pawl 16 which is arranged under the plate 9a and extends the full length of the plate. This pawl is U-shaped, as clearly shown in Fig. 5 and the bend of the U extends througha notch IT in the web 9b adjacent to" the end ii). In the structure shown in Fig. 1, this notch is of sufficient size to form a loose connection and thus permit the pawl to swing freely.

A tab l8 has a bifurcated end 19 which straddles the plate 9a and the bifurcated ends have inturned fingers 20 which extend under the .pawl [6. The fingers are of such size, or width that when the tab I8 is turned to a position at right angles to the slider plates they retract the pawl I6 and thus unlock the slider, as clearly shown in Fig. 1. When, however, the tab is swung into alinement with the plates, as shown for instance in Fig. 3, the pawl can swing carrying the locking finger through the perforation [4 into engagement with the fasteners 3, thus locking the slider. The tab operating on a projection 2| tends to swing the pawl into locking position. It will be noted that the outward movement of the pawl is limited so as to maintain the engaging and of the locking finger in close proximity to the members 3 as the slider is moved along over the members so that the pawl is'maintained in position to readily respond to the slight vibration, or I movement of the slider on the members to swing into locking engagement and that the locking finger of the pawl is diagonally across the lug from the swinging support at the notch I! so that when the pawl is in looking position and is initially engaged any attempt to move the'slider merely forces the pawl more firmly into locking engagement.

In the modification shown in Figs. 8, 9 and 10, the guide plate,-tab lug and tab are of exactly the shape as shown in Figs. 1' to 5. The pawl 22,

however, is formed of resilient metal and the U- bend forms a close fit in the opening formed by The spring of the pawl is such as to yieldingly force the finger 23 into locking engagement, but when the tab is turned out to right angles to the plates, as shown in Fig. 9, the pawl is unlocked. Thus the pawl is in locked position, but may be unlocked by swinging the tab.

In both structures the pawl is entirely concealed by the lug. The U structure affords an easy and convenient means for securing it under the lug and the notch can be readily formed in the web, the pawl put in position before the end I0 is bent into closed position.

What I claim as new is:-

1. In a slider for slide fasteners, the combination of guide plates; a tab lug on one of the plates, the lug having a longitudinal web; a pawl of U form straddling the web and having a pawl finger adapted to lock the slider; and means on the tab lug actuating the pawl.

2. In a slider for slide fasteners, the combination of guide plates; a tab lug on one of the plates, said tab lug having a longitudinal web and a cover plate; a pawl of U form straddling the web and having a pawl finger adapted to lock the slider; and a tab having a bifurcated end with inturned projections extending under the pawl and adapted to actuate the pawl.

3. In a slider for slide fasteners, the combination of guide plates; a tab lug on one of the plates, said tab lug having a cover plate and a longitudinal web; a pawl of U-shape swingingly mounted on the web by a loose connection at its bend and having a pawl finger adapted to lock the slider; and means on the lug retracting the pawl.

4. In a slider for slide fasteners, the combination of guide plates; a tab lug on one of the plates, said tab lug having a cover plate and a longitudinal web; a pawl of U-shape swingingly mounted on the web by a loose connection at its bend and having a pawl finger adapted to lock the slider; a tab on the lug; and means on the tab actuating the pawl.

5. In a slider for slide fasteners, the combination of guide plates; a tab lug on one of the plates having a cover plate and an inwardly extending longitudinal web; a U-shaped pawl straddling the web'and secured thereto, the pawl being resilient and having a pawl finger extending into locking position; and a tab on the lug adapted to retract the pawl.

6. In a slider for slide fasteners, the combination of guide plates; a tab lug on one of the plates having a cover plate and an inwardly extending longitudinal web; a U-shaped pawl straddling the web and secured thereto, the pawl being resilient and having a pawl finger extending into locking position; and a tab on the lug having bifurcated ends with inwardly extending projections under the pawl adapted to actuate the pawl.

7. In a slider for slide fasteners, the combination of guide plates having registering perforations; a tab lug of T-shape cross-section forming a cover plate with an inwardly extending web and having an end extending through the perforations and securing the guide plates together; means securing the opposite end of the tab lug to one of the plates, a pawl on the lug secured to the web-of the lug ;'and a tab on the lug actuating the pawl.

8. In a slider for slide fasteners, the combination of guide plates having guide surfaces thereon adapted to operate fastener members; a tab lug on one of the plates; a pawl housed by the lug pivotally mounted at one end thereof to one end of the lug and having its locking end at the opposite end of the lug, said locking end of the pawl being maintained closely to slider locking position; and a tab on the lug engageable with the pawl at its locking end for releasing the pawl.

NOEL J. POUX. 

